Morloran

I have to say I'm not 100% sure what to do now. I'm quite eager to play on steam, but having played quite a bit of the mobile version and certainly having spent more than 25 euros on it, what is my best option here? Do I buy basic on steam now and wait for the ambassador upgrade?

I got the rooster pop-up when I launched the app, but I can't see it in the P (Promo?) cards section in my gallery. Do I need to do something extra to unlock it?